Chuck



FIG. 1 is a perspective view of a chuck showing a first embodiment of my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a side elevational view showing a second embodiment of my new design. 

The ornamental design for a chuck, as shown and described. 